Part 1, consisting of chapters 2 and 3, first reviews the basic U.S. international tax rules, and then addresses in greater detail the design challenges that they raise, along with their main incentive effects and planning implications. Part 1 could be skimmed or even skipped by readers who either are already well-versed in the operational details, or else do not wish to delve too deeply into the U.S. international tax system’s plumbing. However, it does (chapter 3 in particular) develop some points that are important to the subsequent analysis. Part 2 then shifts to a broader policy focus. To this end, chapter 4 addresses the global welfare perspective on U.S. international tax policy. Chapter 5 addresses the unilateral national welfare perspective. Finally, chapter 6 addresses the question of what practical steps might be taken to improve U.S. international tax policy.